The purpose of this tutorial is to explain
how to take skins used by NPC characters in your The Sims game and make
them usable in your neighborhood in any of the categories of skins the normal
characters use. I.E. Normal Body, Formal Outfit, Winter Outfit, Fashion
Outfit, etc.

In this tutorial we will be using the following programs:

SE NPC MakeOver Kit - Extract NPC Skins

SimEnhancer 3D - Build CMX file and import textures to match

Since this tutorial is being created in October we will be extracting
and building a custom skin set that is appropriate to Halloween. You can
substitute any other NPC outfit though or repeat this to create several
Halloween outfits. The NPC skins we will be extracting are from the Male
Monster (or Zombie). If I recall correctly these were included in the Living
Large Expansion. If you do not have this then just substitute another NPC
that you do have.